.add_container {
  padding: 5%;
  
  .user_login_btn {
    z-index: 2;
    width: 50vw;
    font-size: 50rpx;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
  }

  .cover {
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #eee;
    opacity: .9;
}
}
